1
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Ochiai H, Elouali S, Yamamoto T, Asai H, Noguchi M, Nishiuchi Y. Chemical and Chemoenzymatic Synthesis of Peptide and Protein Therapeutics Conjugated with Human N-Glycans. ChemMedChem 2024; 19:e202300692. [PMID: 38572578 DOI: 10.1002/cmdc.202300692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 04/05/2024]
Abstract
Glycosylation is one of the most ubiquitous post-translational modifications. It affects the structure and function of peptides/proteins and consequently has a significant impact on various biological events. However, the structural complexity and heterogeneity of glycopeptides/proteins caused by the diversity of glycan structures and glycosylation sites complicates the detailed elucidation of glycan function and hampers their clinical applications. To address these challenges, chemical and/or enzyme-assisted synthesis methods have been developed to realize glycopeptides/proteins with well-defined glycan morphologies. In particular, N-glycans are expected to be useful for improving the solubility, in vivo half-life and aggregation of bioactive peptides/proteins that have had limited clinical applications so far due to their short duration of action in the blood and unsuitable physicochemical properties. Chemical glycosylation performed in a post-synthetic procedure can be used to facilitate the development of glycopeptide/protein analogues or mimetics that are superior to the original molecules in terms of physicochemical and pharmacokinetic properties. N-glycans are used to modify targets because they are highly biodegradable and biocompatible and have structures that already exist in the human body. On the practical side, from a quality control perspective, close attention should be paid to their structural homogeneity when they are to be applied to pharmaceuticals.
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Affiliation(s)
- Hirofumi Ochiai
- GlyTech, Inc., 134 Chudoji Minamimachi KRP #1-2F, Shimogyo-ku, Kyoto, 600-8813, Japan
| | - Sofia Elouali
- GlyTech, Inc., 134 Chudoji Minamimachi KRP #1-2F, Shimogyo-ku, Kyoto, 600-8813, Japan
| | - Takahiro Yamamoto
- GlyTech, Inc., 134 Chudoji Minamimachi KRP #1-2F, Shimogyo-ku, Kyoto, 600-8813, Japan
| | - Hiroaki Asai
- GlyTech, Inc., 134 Chudoji Minamimachi KRP #1-2F, Shimogyo-ku, Kyoto, 600-8813, Japan
| | - Masato Noguchi
- GlyTech, Inc., 134 Chudoji Minamimachi KRP #1-2F, Shimogyo-ku, Kyoto, 600-8813, Japan
| | - Yuji Nishiuchi
- GlyTech, Inc., 134 Chudoji Minamimachi KRP #1-2F, Shimogyo-ku, Kyoto, 600-8813, Japan
- Graduate School of Science, Tohoku University, 6-3, Aramaki Aza-Aoba, Aoba-ku, Sendai, 980-8578, Japan
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2
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Maki Y, Kawata K, Liu Y, Goo KY, Okamoto R, Kajihara Y, Satoh A. Design and Synthesis of Glycosylated Cholera Toxin B Subunit as a Tracer of Glycoprotein Trafficking in Organelles of Living Cells. Chemistry 2022; 28:e202201253. [PMID: 35604098 DOI: 10.1002/chem.202201253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Indexed: 12/15/2022]
Abstract
Glycosylation of proteins is known to be essential for changing biological activity and stability of glycoproteins on the cell surfaces and in body fluids. Delivering of homogeneous glycoproteins into the endoplasmic reticulum (ER) and the Golgi apparatus would enable us to investigate the function of asparagine-linked (N-) glycans in the organelles. In this work, we designed and synthesized an intentionally glycosylated cholera toxin B-subunit (CTB) to be transported to the organelles of mammalian cells. The heptasaccharide, the intermediate structure of various complex-type N-glycans, was introduced to the CTB. The synthesized monomeric glycosyl-CTB successfully entered mammalian cells and was transported to the Golgi and the ER, suggesting the potential use of synthetic CTB to deliver and investigate the functions of homogeneous N-glycans in specific organelles of living cells.
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Affiliation(s)
- Yuta Maki
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
- Project Research Center for Fundamental Sciences, Graduate Scholl of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Kazuki Kawata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yanbo Liu
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Kang-Ying Goo
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Ryo Okamoto
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
- Project Research Center for Fundamental Sciences, Graduate Scholl of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yasuhiro Kajihara
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
- Project Research Center for Fundamental Sciences, Graduate Scholl of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Ayano Satoh
- Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Okayama, 700-8530, Japan
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3
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Nomura K, Maki Y, Okamoto R, Satoh A, Kajihara Y. Glycoprotein Semisynthesis by Chemical Insertion of Glycosyl Asparagine Using a Bifunctional Thioacid-Mediated Strategy. J Am Chem Soc 2021; 143:10157-10167. [PMID: 34189908 DOI: 10.1021/jacs.1c02601] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Glycosylation is a major modification of secreted and cell surface proteins, and the resultant glycans show considerable heterogeneity in their structures. To understand the biological processes arising from each glycoform, the preparation of homogeneous glycoproteins is essential for extensive biological experiments. To establish a more robust and rapid synthetic route for the synthesis of homogeneous glycoproteins, we studied several key reactions based on amino thioacids. We found that diacyl disulfide coupling (DDC) formed with glycosyl asparagine thioacid and peptide thioacid yielded glycopeptides. This efficient coupling reaction enabled us to develop a new glycoprotein synthesis method, such as the bifunctional thioacid-mediated strategy, which can couple two peptides with the N- and C-termini of glycosyl asparagine thioacid. Previous glycoprotein synthesis methods required valuable glycosyl asparagine in the early stage and subsequent multiple glycoprotein synthesis routes, whereas the developed concept can generate glycoproteins within a few steps from peptide and glycosyl asparagine thioacid. Herein, we report the characterization of the DDC of amino thioacids and the efficient ability of glycosyl asparagine thioacid to be used for robust glycoprotein semisynthesis.
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Affiliation(s)
| | | | | | - Ayano Satoh
- Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1, Tsushimanaka, Okayama 700-0082, Japan
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4
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Lin JD, Liu X. Recent Development in Ligation Methods for Glycopeptide and Glycoprotein Synthesis. Chem Asian J 2020; 15:2548-2557. [DOI: 10.1002/asia.202000566] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/28/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Junjie Desmond Lin
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Xue‐Wei Liu
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
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5
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Wakamatsu H, Okada Y, Sugai M, Hussaini SR, Chiba K. Photo-Triggered Fluorometric Hydrophobic Benzyl Alcohol for Soluble Tag-Assisted Liquid-Phase Peptide Synthesis. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700401] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Hiroki Wakamatsu
- Department of Applied Biological Science; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu Tokyo 183-8509 Japan
| | - Yohei Okada
- Department of Chemical Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho, Koganei Tokyo 184-8588 Japan
| | - Masae Sugai
- Department of Applied Biological Science; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu Tokyo 183-8509 Japan
| | - Syed R. Hussaini
- Department of Chemistry and Biochemistry; The University of Tulsa, Keplinger Hall; 800 South Tucker Drive Tulsa OK 74104 United States
| | - Kazuhiro Chiba
- Department of Applied Biological Science; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu Tokyo 183-8509 Japan
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6
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Izumi M, Kuruma R, Okamoto R, Seko A, Ito Y, Kajihara Y. Substrate Recognition of Glycoprotein Folding Sensor UGGT Analyzed by Site-Specifically 15N-Labeled Glycopeptide and Small Glycopeptide Library Prepared by Parallel Native Chemical Ligation. J Am Chem Soc 2017; 139:11421-11426. [DOI: 10.1021/jacs.7b03277] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Masayuki Izumi
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Rie Kuruma
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Ryo Okamoto
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Akira Seko
- ERATO
Ito glycotrilogy project, Japan Science and Technology Agency (JST), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yukishige Ito
- ERATO
Ito glycotrilogy project, Japan Science and Technology Agency (JST), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic
Cellular Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yasuhiro Kajihara
- Department
of Chemistry, Graduate School of Science, Osaka University, 1-1
Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- ERATO
Ito glycotrilogy project, Japan Science and Technology Agency (JST), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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7
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Orii R, Sakamoto N, Fukami D, Tsuda S, Izumi M, Kajihara Y, Okamoto R. Total Synthesis of O
-GalNAcylated Antifreeze Glycoprotein using the Switchable Reactivity of Peptidyl-N
-pivaloylguanidine. Chemistry 2017; 23:9253-9257. [DOI: 10.1002/chem.201702243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Ryo Orii
- Department of Chemistry; Graduate School of Science, Osaka University; 1-1, Toyonaka Osaka 5600043 Japan
| | - Noriko Sakamoto
- Department of Chemistry; Graduate School of Science, Osaka University; 1-1, Toyonaka Osaka 5600043 Japan
| | - Daichi Fukami
- Transdisciplinary Life Science Course; Graduate School of Life Science; Hokkaido University and Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); 2-17-2-1 Tsukisamu-Higashi, Toyohira, Sapporo Hokkaido 0628517 Japan
| | - Sakae Tsuda
- Transdisciplinary Life Science Course; Graduate School of Life Science; Hokkaido University and Bioproduction Research Institute; National Institute of Advanced Industrial Science and Technology (AIST); 2-17-2-1 Tsukisamu-Higashi, Toyohira, Sapporo Hokkaido 0628517 Japan
| | - Masayuki Izumi
- Department of Chemistry; Graduate School of Science, Osaka University; 1-1, Toyonaka Osaka 5600043 Japan
| | - Yasuhiro Kajihara
- Department of Chemistry; Graduate School of Science, Osaka University; 1-1, Toyonaka Osaka 5600043 Japan
| | - Ryo Okamoto
- Department of Chemistry; Graduate School of Science, Osaka University; 1-1, Toyonaka Osaka 5600043 Japan
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8
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Shi L, Chen H, Zhang S, Chu T, Zhao Y, Chen Y, Li Y. Semi‐synthesis of murine prion protein by native chemical ligation and chemical activation for preparation of polypeptide‐
α
‐thioester. J Pept Sci 2017; 23:438-444. [DOI: 10.1002/psc.3008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 03/29/2017] [Accepted: 03/29/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Lei Shi
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
| | - Huai Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
| | - Si‐Yu Zhang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
| | - Ting‐Ting Chu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
| | - Yu‐Fen Zhao
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
| | - Yong‐Xiang Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
| | - Yan‐Mei Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University Beijing 100084 China
- Beijing Institute for Brain Disorders Beijing 100069 China
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9
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Minh Hien N, Izumi M, Sato H, Okamoto R, Kajihara Y. Chemical Synthesis of Glycoproteins with the Specific Installation of Gradient-Enriched 15
N-Labeled Amino Acids for Getting Insights into Glycoprotein Behavior. Chemistry 2017; 23:6579-6585. [DOI: 10.1002/chem.201606049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Nguyen Minh Hien
- Deprtment of Chemistry; Osaka University; 1-1, Machikaneyama Toyonaka 560-0043 Japan
- Current address: Department of Chemistry; Da Nang University of Education; the University of Da Nang; Vietnam
| | - Masayuki Izumi
- Deprtment of Chemistry; Osaka University; 1-1, Machikaneyama Toyonaka 560-0043 Japan
| | - Hajime Sato
- Bruker BioSpin K.K.; 3-9, Moriya-cho Kanagawa-ku, Yokohama, Kanagawa
| | - Ryo Okamoto
- Deprtment of Chemistry; Osaka University; 1-1, Machikaneyama Toyonaka 560-0043 Japan
| | - Yasuhiro Kajihara
- Deprtment of Chemistry; Osaka University; 1-1, Machikaneyama Toyonaka 560-0043 Japan
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10
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Okamoto R. Recent Advancements in the Preparation of Structurally Defined Glycoproteins. TRENDS GLYCOSCI GLYC 2017. [DOI: 10.4052/tigg.1612.2j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Ryo Okamoto
- Department of Chemistry, Graduate School of Science, Osaka University
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11
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Okamoto R. Recent Advancements in the Preparation of Structurally Defined Glycoproteins. TRENDS GLYCOSCI GLYC 2017. [DOI: 10.4052/tigg.1612.2e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Ryo Okamoto
- Department of Chemistry, Graduate School of Science, Osaka University
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12
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Raz R, Burlina F, Ismail M, Downward J, Li J, Smerdon SJ, Quibell M, White PD, Offer J. HF-Free Boc Synthesis of Peptide Thioesters for Ligation and Cyclization. Angew Chem Int Ed Engl 2016; 55:13174-13179. [PMID: 27654901 PMCID: PMC5113665 DOI: 10.1002/anie.201607657] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Indexed: 01/03/2023]
Abstract
We have developed a convenient method for the direct synthesis of peptide thioesters, versatile intermediates for peptide ligation and cyclic peptide synthesis. The technology uses a modified Boc SPPS strategy that avoids the use of anhydrous HF. Boc in situ neutralization protocols are used in combination with Merrifield hydroxymethyl resin and TFA/TMSBr cleavage. Avoiding HF extends the scope of Boc SPPS to post-translational modifications that are compatible with the milder cleavage conditions, demonstrated here with the synthesis of the phosphorylated protein CHK2. Peptide thioesters give easy, direct, access to cyclic peptides, illustrated by the synthesis of cyclorasin, a KRAS inhibitor.
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Affiliation(s)
- Richard Raz
- The Francis Crick Institute, 1 Midland road, London, NW1 1AT, UK
| | - Fabienne Burlina
- Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS, Laboratoire des Biomolécules (LBM), Paris, France
- Département de Chimie, ENS, PSL Research University, UPMC, Univ Paris 06, CNRS, LBM, Paris, France
| | - Mohamed Ismail
- The Francis Crick Institute, 1 Midland road, London, NW1 1AT, UK
| | - Julian Downward
- The Francis Crick Institute, 1 Midland road, London, NW1 1AT, UK
| | - Jiejin Li
- The Francis Crick Institute, 1 Midland road, London, NW1 1AT, UK
| | | | - Martin Quibell
- The Francis Crick Institute, 1 Midland road, London, NW1 1AT, UK
| | - Peter D White
- Merck Chemicals, Padge Road, Beeston, Notts, NG9 2JR, UK
| | - John Offer
- The Francis Crick Institute, 1 Midland road, London, NW1 1AT, UK.
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13
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Raz R, Burlina F, Ismail M, Downward J, Li J, Smerdon SJ, Quibell M, White PD, Offer J. HF-Free Boc Synthesis of Peptide Thioesters for Ligation and Cyclization. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607657] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Richard Raz
- The Francis Crick Institute; 1 Midland road London NW1 1AT UK
| | - Fabienne Burlina
- Sorbonne Universités, UPMC Univ Paris 06, ENS, CNRS; Laboratoire des Biomolécules (LBM); Paris France
- Département de Chimie, ENS; PSL Research University, UPMC, Univ Paris 06, CNRS, LBM; Paris France
| | - Mohamed Ismail
- The Francis Crick Institute; 1 Midland road London NW1 1AT UK
| | - Julian Downward
- The Francis Crick Institute; 1 Midland road London NW1 1AT UK
| | - Jiejin Li
- The Francis Crick Institute; 1 Midland road London NW1 1AT UK
| | | | - Martin Quibell
- The Francis Crick Institute; 1 Midland road London NW1 1AT UK
| | | | - John Offer
- The Francis Crick Institute; 1 Midland road London NW1 1AT UK
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14
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Gates ZP, Dhayalan B, Kent SBH. Obviation of hydrogen fluoride in Boc chemistry solid phase peptide synthesis of peptide-αthioesters. Chem Commun (Camb) 2016; 52:13979-13982. [DOI: 10.1039/c6cc07891e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trifluoromethanesulfonic acid performs comparably to hydrogen fluoride for the on-resin global deprotection of peptides prepared by Boc chemistry solid phase peptide synthesis.
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15
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Akbulut H, Endo T, Yamada S, Yagci Y. Synthesis and characterization of polyphenylenes with polypeptide and poly(ethylene glycol) side chains. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27621] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Huseyin Akbulut
- Department of Chemistry; Istanbul Technical University; Istanbul 34469 Turkey
| | - Takeshi Endo
- Molecular Engineering Institute; Kinki University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Shuhei Yamada
- Molecular Engineering Institute; Kinki University; 11-6 Kayanomori Iizuka Fukuoka 820-8555 Japan
| | - Yusuf Yagci
- Department of Chemistry; Istanbul Technical University; Istanbul 34469 Turkey
- Center of Excellence for Advanced Materials Research (CEAMR) and Chemistry Department; Faculty of Science; King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
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16
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Izumi M, Otsuki A, Nishihara M, Okamoto R, Kajihara Y. Chemical synthesis of a synthetic analogue of the sialic acid-binding lectin siglec-7. Chembiochem 2014; 15:2503-7. [PMID: 25277834 DOI: 10.1002/cbic.201402494] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Indexed: 11/09/2022]
Abstract
As a basis for the development of an artificial carbohydrate-binding lectin, we chemically synthesized a domain of siglec-7, a well-characterized sialic-acid-binding lectin. The full polypeptide (127 amino acids) was constructed by sequential native chemical ligation (NCL) of five peptide segments. Because of poor cysteine availability for NCL, cysteine residues were introduced at suitable ligation sites; these cysteine residues were alkylated in order to mimic native glutamine or asparagine residues, or converted to an alanine residue by desulfurization after NCL. After folding the full-length polypeptide, the sialic-acid-binding activity of the synthetic siglec-7 was clearly demonstrated by STD NMR and ELISA experiments. We succeeded in the synthesis of siglec-7 by installing three extra cysteine residues with side-chain modifications and found that these modifications did not affect the binding activity.
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Affiliation(s)
- Masayuki Izumi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan)
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17
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Zheng JS, Chen X, Tang S, Chang HN, Wang FL, Zuo C. A New Method for Synthesis of Peptide Thioesters via Irreversible N-to-S Acyl Transfer. Org Lett 2014; 16:4908-11. [DOI: 10.1021/ol5024213] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ji-Shen Zheng
- High
Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xin Chen
- Tsinghua-Peking
Center for Life Sciences, Tsinghua University, Beijing 100084, China
| | - Shan Tang
- Tsinghua-Peking
Center for Life Sciences, Tsinghua University, Beijing 100084, China
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Hao-Nan Chang
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Feng-Liang Wang
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Chao Zuo
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
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18
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Chemical synthesis of proteins using N-sulfanylethylanilide peptides, based on N-S acyl transfer chemistry. Top Curr Chem (Cham) 2014; 363:33-56. [PMID: 25467538 DOI: 10.1007/128_2014_586] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Native chemical ligation (NCL), which features the use of peptide thioesters, is among the most reliable ligation protocols in chemical protein synthesis. Thioesters have conventionally been synthesized using tert-butyloxycarbonyl (Boc)-based solid-phase peptide synthesis (SPPS); however, the increasing use of 9-fluorenylmethyloxycarbonyl (Fmoc) SPPS requires an efficient preparative protocol for thioesters which is fully compatible with Fmoc chemistry. We have addressed this issue by mimicking the naturally occurring thioester-forming step seen in intein-mediated protein splicing of the intein-extein system, using an appropriate chemical device to induce N-S acyl transfer reaction, avoiding the problems associated with Fmoc strategies. We have developed N-sulfanylethylanilide (SEAlide) peptides, which can be synthesized by standard Fmoc SPPS and converted to the corresponding thioesters through treatment under acidic conditions. Extensive examination of SEAlide peptides showed that the amide-type SEAlide peptides can be directly and efficiently involved in NCL via thioester species in the presence of phosphate salts, even under neutral conditions. The presence or absence of phosphate salts provided kinetically controllable chemoselectivity in NCL for SEAlide peptides. This allowed SEAlide peptides to be used in both one-pot/N-to-C-directed sequential NCL under kinetically controlled conditions, and the convergent coupling of large peptide fragments, which facilitated the chemical synthesis of proteins over about 100 residues. The use of SEAlide peptides, enabling sequential NCL operated under kinetically controlled conditions, and the convergent coupling, were used for the total chemical synthesis of a 162-residue monoglycosylated GM2-activator protein (GM2AP) analog.
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